//
// Created by deepin on 2020/11/12.
//
#include <iostream>
#include <cctype>
#include "stack.h"

/*int main ()
{
  using namespace std;
  Stack st;
  char ch;
  unsigned long po;
  cout << "Please enter A to add a purchase order,\n"
      <<"p to process a PO,or Q to quit.\n";
  while (cin >> ch && toupper(ch)!='Q')
  {
    while (cin.get()!='\n') continue;
    if (!isalpha(ch))
    {
      cout << "\a";
      continue;
    }
    switch (ch)
    {
        case 'A':
        case 'a':cout<<"Enter a PO number to add: ";
        cin>>po;
        if(st.isfull())
           cout << "stack already full\n";
        else
           st.push(po);
        break;
        case 'P':
        case 'p': if(st.isempty()) cout <<"stack already empty\n";
        else {
            st.pop(po);
            cout << "PO# "<<po <<" popped\n";
        }
        break;
    }
    cout << "Please enter A to add a purchase order,\n"
         << "P to process a PO ,or Q to quit\n";
  }
  cout << "Bye\n";
  return 0;
}*/
